CA2387553C - Vacuum cleaner - Google Patents
Vacuum cleaner Download PDFInfo
- Publication number
- CA2387553C CA2387553C CA002387553A CA2387553A CA2387553C CA 2387553 C CA2387553 C CA 2387553C CA 002387553 A CA002387553 A CA 002387553A CA 2387553 A CA2387553 A CA 2387553A CA 2387553 C CA2387553 C CA 2387553C
- Authority
- CA
- Canada
- Prior art keywords
- dust
- air
- cleaner body
- disposed
- collecting apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
- A47L5/28—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
- A47L9/1658—Construction of outlets
- A47L9/1666—Construction of outlets with filtering means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/03—Vacuum cleaner
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filters For Electric Vacuum Cleaners (AREA)
Abstract
A vacuum cleaner comprises a suction brush movably disposed at a lower portion of a cleaner body, a by-pass motor disposed in the cleaner body and generating a suction force at the suction brush, a cyclone dust-collecting apparatus disposed in the cleaner body and having an inflow passage, into which air passing by the by-pass motor flows, and an outflow passage through which the air cleaned by a separation effect of centrifugal force is discharged, and a dust bag disposed in the cleaner body and connected to the outflow passage for filtering minute dust entrained in the once cleaned air which is discharged from the cyclone dust-collecting apparatus.
Description
VACUUM CLEANER
BACKGROUND OF THE INVENTION
1. Field of the Invention The present invention relates to a vacuum cleaner using a by-pass motor.
BACKGROUND OF THE INVENTION
1. Field of the Invention The present invention relates to a vacuum cleaner using a by-pass motor.
2. Description of the Related Art FIG. 1 shows a conventional vacuum cleaner using a by-pass motor.
Referring to FIG. 1, the vacuum cleaner comprises a cleaner body 1 and a suction brush 2 movably connected to a lower portion of the cleaner body 1. In the lower portion of the cleaner body l, a by-pass motor (not illustrated) is disposed. Being driven, the by-pass motor generates a suction force at the suction brush 2. Due to the suction force, dirt is drawn in from a cleaning surface through the suction brush 2 with air.
The drawn-in air flows into an inflow path, which is disposed in the cleaner body 1, passing by the by-pass motor. Then, the air flows into a dust pocket 4 connected to an outlet 3 of the inflow path. That is, the air including the dirt is drawn in through the suction brush 2 and then directly flows into the dust pocket 4 by a discharge pressure of the by-pass motor, simply passing by the by-pass motor. An inner side of the dust pocket 4 is enclosed by a dust filter such that the dirt entrained in the air are filtered out and cleaned air is exhausted through the dust pocket 4. At this time, the dust pocket 4 is made of porous material or cloths not to restrict flow of the air that is discharged by the discharge pressure of the by-pass motor. Also, the dust pocket 4 is provided with a zipper 4a for opening and closing the dust pocket 4 such that, when the dust pocket 4 is full of the dirt, the dirt are easily emptied. Accordingly, when the dust pocket 4 is full of the dirt during a cleaning operation, the dust pocket 4 is emptied in a manner that the dust pocket 4 is removed from the cleaner body 1, and then the dust filter is only extracted from the dust pocket 4 through the opened zipper 4a to be discarded.
Next, the old dust filter is replaced with a new one in the dust pocket 4 However, the vacuum cleaner as constructed above is mainly used for work places such as a hotel or a shop. In consideration of characteristic of the work places, it is required for the dust pocket 4 to be very frequently emptied. Thus, since the old dust filter is frequently replaced by a new one, there is a problem of cost.
Also, taking the cost into the consideration, the dust filter can be recycled.
At that time, however, there is inconvenience of having to shake the dirt off the dust filter, and there is a sanitary problem because a large amount of dust is generated while the dirt is shaken off the dust filter.
SUMMARY OF THE INVENTION
The present invention is developed in order to solve the above problems. An object of the present invention is to provide a vacuum cleaner having an improved structure such that filtered dirt can be easily removed and the cost can be reduced.
According to the present invention in order to achieve the above object, a vacuum cleaner comprises a suction brush movably disposed at a lower portion of a cleaner body, a by-pass motor disposed in the cleaner body and generating a suction force at the suction brush, a cyclone dust-collecting apparatus disposed in the cleaner body and having an inflow passage, into which air passing by the by-pass motor flows, and an outflow passage through which the air cleaned by a separation effect of centrifugal force is discharged, and a dust bag disposed in the cleaner body and connected to the outflow passage for filtering minute dust entrained in the once cleaned air which is discharged from the cyclone dust-collecting apparatus.
Here, preferably, the cleaner body comprises a first air path connecting the by-pass motor to the inflow passage of the cyclone dust-collecting apparatus, and a second air path connecting the outflow passage of the cyclone dust-collecting apparatus to the dust bag.
Referring to FIG. 1, the vacuum cleaner comprises a cleaner body 1 and a suction brush 2 movably connected to a lower portion of the cleaner body 1. In the lower portion of the cleaner body l, a by-pass motor (not illustrated) is disposed. Being driven, the by-pass motor generates a suction force at the suction brush 2. Due to the suction force, dirt is drawn in from a cleaning surface through the suction brush 2 with air.
The drawn-in air flows into an inflow path, which is disposed in the cleaner body 1, passing by the by-pass motor. Then, the air flows into a dust pocket 4 connected to an outlet 3 of the inflow path. That is, the air including the dirt is drawn in through the suction brush 2 and then directly flows into the dust pocket 4 by a discharge pressure of the by-pass motor, simply passing by the by-pass motor. An inner side of the dust pocket 4 is enclosed by a dust filter such that the dirt entrained in the air are filtered out and cleaned air is exhausted through the dust pocket 4. At this time, the dust pocket 4 is made of porous material or cloths not to restrict flow of the air that is discharged by the discharge pressure of the by-pass motor. Also, the dust pocket 4 is provided with a zipper 4a for opening and closing the dust pocket 4 such that, when the dust pocket 4 is full of the dirt, the dirt are easily emptied. Accordingly, when the dust pocket 4 is full of the dirt during a cleaning operation, the dust pocket 4 is emptied in a manner that the dust pocket 4 is removed from the cleaner body 1, and then the dust filter is only extracted from the dust pocket 4 through the opened zipper 4a to be discarded.
Next, the old dust filter is replaced with a new one in the dust pocket 4 However, the vacuum cleaner as constructed above is mainly used for work places such as a hotel or a shop. In consideration of characteristic of the work places, it is required for the dust pocket 4 to be very frequently emptied. Thus, since the old dust filter is frequently replaced by a new one, there is a problem of cost.
Also, taking the cost into the consideration, the dust filter can be recycled.
At that time, however, there is inconvenience of having to shake the dirt off the dust filter, and there is a sanitary problem because a large amount of dust is generated while the dirt is shaken off the dust filter.
SUMMARY OF THE INVENTION
The present invention is developed in order to solve the above problems. An object of the present invention is to provide a vacuum cleaner having an improved structure such that filtered dirt can be easily removed and the cost can be reduced.
According to the present invention in order to achieve the above object, a vacuum cleaner comprises a suction brush movably disposed at a lower portion of a cleaner body, a by-pass motor disposed in the cleaner body and generating a suction force at the suction brush, a cyclone dust-collecting apparatus disposed in the cleaner body and having an inflow passage, into which air passing by the by-pass motor flows, and an outflow passage through which the air cleaned by a separation effect of centrifugal force is discharged, and a dust bag disposed in the cleaner body and connected to the outflow passage for filtering minute dust entrained in the once cleaned air which is discharged from the cyclone dust-collecting apparatus.
Here, preferably, the cleaner body comprises a first air path connecting the by-pass motor to the inflow passage of the cyclone dust-collecting apparatus, and a second air path connecting the outflow passage of the cyclone dust-collecting apparatus to the dust bag.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic perspective view showing a conventional vacuum cleaner;
FIG. 2 is a schematic exploded perspective view showing a vacuum cleaner in accordance with a preferred embodiment of the present invention; and FIG. 3 is a schematic cross section view showing the vacuum cleaner of the FIG. 2.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Hereinafter, a vacuum cleaner according to a preferred embodiment of the present invention will be described in greater detail with reference to the accompanying drawings.
Referring to FIGS. 2 and 3, in accordance with a preferred embodiment of the present invention, a vacuum cleaner comprises a cleaner body 10, a suction brush 20 movably disposed at a lower portion of the cleaner body 10, a by-pass motor 30 disposed in a lower portion of the cleaner body 10, and a cyclone dust-collecting apparatus 40 and a dust bag 50 which are disposed in the cleaner body 10.
The cleaner body 10 of an up-right type vacuum cleaner has a handle disposed at an upper end thereof and mount portions I1 and I3 disposed at a front portion thereof.
The cyclone dust-collecting apparatus 40 and the dust bag 50 are disposed in the mount portions 1 l and 13, respectively.
The suction brush 20 is capable of moving along a cleaning surface. When the by-pass motor 30 is driven, a suction force is generated at an inlet of the suction brush 20. Due to the suction force, dust or dirt is drawn in from the cleaning surface with air.
The by-pass motor 30 generates the suction force at the suction brush 20. The by-pass motor is generally used for when dirt such as dust or water are drawn in together with air. Accordingly, the air flowing into a front portion of the by-pass motor 30 flows out along a side portion of the by-pass motor 30, without passing through the by-pass motor 30. Since the by-pass motor 30 is a generally used motor, the description thereof will be omitted.
The cyclone dust-collecting apparatus 40 is removably disposed in the mount portion 11. The cyclone dust-collecting apparatus 40 is a well-known dust-collecting apparatus, comprising a dust-collecting vessel 42 having a grill 4I and a dirt-collecting vessel 43 connected to a lower portion of the dust-collecting vessel 42. The dust-collecting vessel 42 is provided with an inflow passage 42a and an outflow passage 42b.
FIG. 1 is a schematic perspective view showing a conventional vacuum cleaner;
FIG. 2 is a schematic exploded perspective view showing a vacuum cleaner in accordance with a preferred embodiment of the present invention; and FIG. 3 is a schematic cross section view showing the vacuum cleaner of the FIG. 2.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Hereinafter, a vacuum cleaner according to a preferred embodiment of the present invention will be described in greater detail with reference to the accompanying drawings.
Referring to FIGS. 2 and 3, in accordance with a preferred embodiment of the present invention, a vacuum cleaner comprises a cleaner body 10, a suction brush 20 movably disposed at a lower portion of the cleaner body 10, a by-pass motor 30 disposed in a lower portion of the cleaner body 10, and a cyclone dust-collecting apparatus 40 and a dust bag 50 which are disposed in the cleaner body 10.
The cleaner body 10 of an up-right type vacuum cleaner has a handle disposed at an upper end thereof and mount portions I1 and I3 disposed at a front portion thereof.
The cyclone dust-collecting apparatus 40 and the dust bag 50 are disposed in the mount portions 1 l and 13, respectively.
The suction brush 20 is capable of moving along a cleaning surface. When the by-pass motor 30 is driven, a suction force is generated at an inlet of the suction brush 20. Due to the suction force, dust or dirt is drawn in from the cleaning surface with air.
The by-pass motor 30 generates the suction force at the suction brush 20. The by-pass motor is generally used for when dirt such as dust or water are drawn in together with air. Accordingly, the air flowing into a front portion of the by-pass motor 30 flows out along a side portion of the by-pass motor 30, without passing through the by-pass motor 30. Since the by-pass motor 30 is a generally used motor, the description thereof will be omitted.
The cyclone dust-collecting apparatus 40 is removably disposed in the mount portion 11. The cyclone dust-collecting apparatus 40 is a well-known dust-collecting apparatus, comprising a dust-collecting vessel 42 having a grill 4I and a dirt-collecting vessel 43 connected to a lower portion of the dust-collecting vessel 42. The dust-collecting vessel 42 is provided with an inflow passage 42a and an outflow passage 42b.
The air passing by the by-pass motor 30 flows into the dust-collecting vessel 42 through the inflow passage 42a, and the air cleaned by a separation effect of centrifugal force is discharged from the dust-collecting vessel 42 through the outflow passage 42b.
That is, the air flows into the dust-collecting vessel through the inflow passage 42a in an oblique direction, forming a vortex. Furthermore, due to the dirt separation effect of the vortex by centrifugal force, the dirt of lager particles falls on the dirt-collecting vessel 43, while the cleaned air flows up to be discharged through the outflow passage 42b.
Meanwhile, the cleaner body 10 comprises a first air path 15, which connects the by-pass motor 30 to the inflow passage 42a of the cyclone dust-collecting apparatus 40, and a second air path 17 which connects the outflow passage 42b of the cyclone dust-collecting apparatus 40 to the dust bag 50.
The dust bag 50 is removably disposed in the mount portion 13. The dust bag 50 is connected to the second air path 17 to filter minute dust entrained in the once cleaned air discharged from the cyclone dust-collecting apparatus 40. The dust bag 50 is made of material that allows the dust to be filtered therethorugh when the dust and air is discharged by a discharge pressure of the air, and only the air to leak out of the dust bag 50. The dust bag 50 is a commonly used dust bag. Alternatively, a disposable dust bag may be employed as the dust bag 50 to be replaced with a new one when the dust bag 50 is full of the dirt.
An operation of the vacuum cleaner as constructed above according to the preferred embodiment of the present invention will be described.
First, if the by-pass motor 30 is driven, the suction force is generated at the inlet of the suction brush 20. Due to the suction force, the air including the dirt and dust is drawn in through the suction brush 20. The air passes by the by-pass motor 30.
Then, the air passing by the by-pass motor 30 flows into the cyclone dust-collecting apparatus 40 through the first air path 15 by the discharge pressure. As described above, among the dirt entrained in the air, dirt of larger particles is filtered out by the cyclone dust-collecting apparatus 40, and the cleaned air is discharged toward the dust bag 50 through the outflow passage 17. Then, the air passes through the dust bag 50 by the discharge pressure and is discharged outside. At this time, the minute dust, which is not filtered out by the cyclone dust-collecting apparatus 40, is filtered out by the dust bag 50.
Since the dirt of larger particles remains in the cyclone dust-collecting apparatus 40, the dirt-collecting vessel 43 is full of the dirt in a short time. On the other hand, since the dust of smaller particles is collected at the dust bag 50, the dust bag 50 is full of the dust in a relatively long time.
That is, the air flows into the dust-collecting vessel through the inflow passage 42a in an oblique direction, forming a vortex. Furthermore, due to the dirt separation effect of the vortex by centrifugal force, the dirt of lager particles falls on the dirt-collecting vessel 43, while the cleaned air flows up to be discharged through the outflow passage 42b.
Meanwhile, the cleaner body 10 comprises a first air path 15, which connects the by-pass motor 30 to the inflow passage 42a of the cyclone dust-collecting apparatus 40, and a second air path 17 which connects the outflow passage 42b of the cyclone dust-collecting apparatus 40 to the dust bag 50.
The dust bag 50 is removably disposed in the mount portion 13. The dust bag 50 is connected to the second air path 17 to filter minute dust entrained in the once cleaned air discharged from the cyclone dust-collecting apparatus 40. The dust bag 50 is made of material that allows the dust to be filtered therethorugh when the dust and air is discharged by a discharge pressure of the air, and only the air to leak out of the dust bag 50. The dust bag 50 is a commonly used dust bag. Alternatively, a disposable dust bag may be employed as the dust bag 50 to be replaced with a new one when the dust bag 50 is full of the dirt.
An operation of the vacuum cleaner as constructed above according to the preferred embodiment of the present invention will be described.
First, if the by-pass motor 30 is driven, the suction force is generated at the inlet of the suction brush 20. Due to the suction force, the air including the dirt and dust is drawn in through the suction brush 20. The air passes by the by-pass motor 30.
Then, the air passing by the by-pass motor 30 flows into the cyclone dust-collecting apparatus 40 through the first air path 15 by the discharge pressure. As described above, among the dirt entrained in the air, dirt of larger particles is filtered out by the cyclone dust-collecting apparatus 40, and the cleaned air is discharged toward the dust bag 50 through the outflow passage 17. Then, the air passes through the dust bag 50 by the discharge pressure and is discharged outside. At this time, the minute dust, which is not filtered out by the cyclone dust-collecting apparatus 40, is filtered out by the dust bag 50.
Since the dirt of larger particles remains in the cyclone dust-collecting apparatus 40, the dirt-collecting vessel 43 is full of the dirt in a short time. On the other hand, since the dust of smaller particles is collected at the dust bag 50, the dust bag 50 is full of the dust in a relatively long time.
Accordingly, while it is required for the dust-collecting apparatus 40 to be frequently emptied, it is not necessary to replace the dust bag 50 with a new one so much frequently. Therefore, an increase of the cost of replacing the dust bag 50 can be prevented. Since it is not necessary to empty the dust bag 50, a sanitary problem can be solved. Since the dirt-collecting vessel 43 is removed from the dust-collecting vessel 42 to be emptied, the dirt-collecting vessel 43 can be semi-permanently used.
Thus, there is no need for an extra cost, and it is more sanitary because it is not required to shake the dust-collecting vessel 43.
As described above, according to the present invention, the dirt entrained in the air drawn in by the discharge pressure of the by-pass motor 30 is firstly filtered out by the separation effect of centrifugal force, and then the minute dust is secondarily filtered out by the dust bag 50.
Accordingly, since a using period for the dust bag 50 until replacement can be extended, the cost of using the dust bag 50 can be reduced. Also, since the cyclone dust-collecting apparatus 40, holding the dirt therein, is easily emptied by simply removing the dust-collecting vessel 43, it is more convenient and sanitary.
Thus, there is no need for an extra cost, and it is more sanitary because it is not required to shake the dust-collecting vessel 43.
As described above, according to the present invention, the dirt entrained in the air drawn in by the discharge pressure of the by-pass motor 30 is firstly filtered out by the separation effect of centrifugal force, and then the minute dust is secondarily filtered out by the dust bag 50.
Accordingly, since a using period for the dust bag 50 until replacement can be extended, the cost of using the dust bag 50 can be reduced. Also, since the cyclone dust-collecting apparatus 40, holding the dirt therein, is easily emptied by simply removing the dust-collecting vessel 43, it is more convenient and sanitary.
Claims (2)
1. A vacuum cleaner comprising:
a suction brush movably disposed at a lower portion of a cleaner body;
a by-pass motor disposed in the cleaner body and generating a suction force at the suction brush;
a cyclone dust-collecting apparatus disposed in the cleaner body and having an inflow passage, into which air passing by the by-pass motor flows, and an outflow passage through which the air cleaned by a separation effect of centrifugal force is discharged; and a dust bag disposed in the cleaner body and connected to the outflow passage for filtering minute dust entrained in the once cleaned air which is discharged from the cyclone dust-collecting apparatus.
a suction brush movably disposed at a lower portion of a cleaner body;
a by-pass motor disposed in the cleaner body and generating a suction force at the suction brush;
a cyclone dust-collecting apparatus disposed in the cleaner body and having an inflow passage, into which air passing by the by-pass motor flows, and an outflow passage through which the air cleaned by a separation effect of centrifugal force is discharged; and a dust bag disposed in the cleaner body and connected to the outflow passage for filtering minute dust entrained in the once cleaned air which is discharged from the cyclone dust-collecting apparatus.
2. The vacuum cleaner of claim 1, wherein the cleaner body comprises:
a first air path connecting the by-pass motor to the inflow passage of the cyclone dust-collecting apparatus; and a second air path connecting the outflow passage of the cyclone dust-collecting apparatus to the dust bag.
a first air path connecting the by-pass motor to the inflow passage of the cyclone dust-collecting apparatus; and a second air path connecting the outflow passage of the cyclone dust-collecting apparatus to the dust bag.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2001-45773 | 2001-07-28 | ||
| KR10-2001-0045773A KR100412583B1 (en) | 2001-07-28 | 2001-07-28 | Vaccum cleaner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2387553A1 CA2387553A1 (en) | 2003-01-28 |
| CA2387553C true CA2387553C (en) | 2005-09-20 |
Family
ID=19712683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002387553A Expired - Fee Related CA2387553C (en) | 2001-07-28 | 2002-05-27 | Vacuum cleaner |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6732405B2 (en) |
| KR (1) | KR100412583B1 (en) |
| AU (1) | AU763287B2 (en) |
| CA (1) | CA2387553C (en) |
| GB (1) | GB2378125B (en) |
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| KR100377015B1 (en) * | 2000-08-07 | 2003-03-26 | 삼성광주전자 주식회사 | Cyclone dust-collecting apparatus for Vacuum Cleaner |
| KR100377016B1 (en) * | 2000-10-19 | 2003-03-26 | 삼성광주전자 주식회사 | Upright type Vacuum Cleaner |
| KR100406639B1 (en) * | 2001-01-11 | 2003-11-21 | 삼성광주전자 주식회사 | Upright typed vacuum cleaner |
-
2001
- 2001-07-28 KR KR10-2001-0045773A patent/KR100412583B1/en not_active IP Right Cessation
- 2001-11-21 GB GB0127885A patent/GB2378125B/en not_active Expired - Fee Related
- 2001-12-05 AU AU97094/01A patent/AU763287B2/en not_active Ceased
-
2002
- 2002-02-08 US US10/071,111 patent/US6732405B2/en not_active Expired - Fee Related
- 2002-05-27 CA CA002387553A patent/CA2387553C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| GB0127885D0 (en) | 2002-01-16 |
| GB2378125A (en) | 2003-02-05 |
| KR20030010994A (en) | 2003-02-06 |
| US6732405B2 (en) | 2004-05-11 |
| US20030019073A1 (en) | 2003-01-30 |
| AU9709401A (en) | 2003-01-30 |
| AU763287B2 (en) | 2003-07-17 |
| KR100412583B1 (en) | 2003-12-31 |
| GB2378125B (en) | 2003-07-09 |
| CA2387553A1 (en) | 2003-01-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |